Phase 1 Total Maximum Daily Load for Organic Enrichment/Low DO and Nutrients
Total Page:16
File Type:pdf, Size:1020Kb
FINAL REPORT June 2003 Phase 1 Total Maximum Daily Load For Organic Enrichment/Low DO and Nutrients Deer Creek Yazoo River Basin Washington County, Mississippi Prepared By Mississippi Department of Environmental Quality Office of Pollution Control TMDL/WLA Section/Water Quality Assessment Branch MDEQ PO Box 10385 Jackson, MS 39289-0385 (601) 961-5171 www.deq.state.ms.us Organic Enrichment/Low Dissolved Oxygen TMDL for Deer Creek FOREWORD This report has been prepared in accordance with the schedule contained within the federal consent decree dated December 22, 1998. The report contains one or more Total Maximum Daily Loads (TMDLs) for waterbody segments found on Mississippi’s 1996 Section 303(d) List of Impaired Waterbodies. Because of the accelerated schedule required by the consent decree, many of these TMDLs have been prepared out of sequence with the State’s rotating basin approach. The implementation of the TMDLs contained herein will be prioritized within Mississippi’s rotating basin approach. The amount and quality of the data on which this report is based are limited. As additional information becomes available, the TMDLs may be updated. Such additional information may include water quality and quantity data, changes in pollutant loadings, or changes in landuse within the watershed. In some cases, additional water quality data may indicate that no impairment exists. Prefixes for fractions and multiples of SI units Fraction Prefix Symbol Multiple Prefix Symbol 10-1 deci d 10 deka da 10-2 centi c 102 hecto h 10-3 milli m 103 kilo k 10-6 micro µ 106 mega M 10-9 nano n 109 giga G 10-12 pico p 1012 tera T 10-15 femto f 1015 peta P 10-18 atto a 1018 exa E Conversion Factors To convert from To Multiply by To Convert from To Multiply by Acres Sq. miles 0.0015625 Days Seconds 86400 Cubic feet Cu. Meter 0.028316847 Feet Meters 0.3048 Cubic feet Gallons 7.4805195 Gallons Cu feet 0.133680555 Cubic feet Liters 28.316847 Hectares Acres 2.4710538 cfs Gal/min 448.83117 Miles Meters 1609.344 cfs MGD .6463168 mg/l ppm 1 Cubic meters Gallons 264.17205 µg/l * cfs Gm/day 2.45 Yazoo River Basin 1 Organic Enrichment/Low Dissolved Oxygen TMDL for Deer Creek CONTENTS FOREWORD .................................................................................................................................. 1 CONTENTS.................................................................................................................................... 2 TMDL INFORMATION PAGE ..................................................................................................... 4 EXECUTIVE SUMMARY............................................................................................................. 5 INTRODUCTION........................................................................................................................... 8 1.1 Background ........................................................................................................................... 8 1.2 Applicable Waterbody Segment Use .................................................................................... 9 1.3 Applicable Waterbody Segment Standard ............................................................................ 9 1.4 Selection of a TMDL Endpoint and Critical Condition........................................................ 9 WATERBODY ASSESSMENT................................................................................................... 10 2.1 Discussion of Instream Water Quality Data........................................................................ 10 2.2 Assessment of Point Sources ..............................................................................................17 2.3 Assessment of Nonpoint Sources....................................................................................... 17 MODELING PROCEDURE: LINKING THE SOURCES TO THE ENDPOINT ..................... 20 4.1 Modeling Framework Selection......................................................................................... 20 4.2 Model Setup ....................................................................................................................... 21 4.3 Source Representation........................................................................................................ 23 4.4 Model Calibration .............................................................................................................. 26 4.5 Model Results..................................................................................................................... 26 4.6 Evaluation of Ammonia Toxicity........................................................................................ 28 ALLOCATION ............................................................................................................................. 29 5.1 Wasteload Allocation ......................................................................................................... 29 5.2 Load Allocation.................................................................................................................. 29 5.3. Seasonality ........................................................................................................................ 30 5.4 Incorporation of a Margin of Safety................................................................................... 30 5.5 Calculation of the TMDL................................................................................................... 30 CONCLUSION ............................................................................................................................. 32 6.1 Future Monitoring .............................................................................................................. 32 6.2 Public Participation ............................................................................................................ 32 REFERENCES..............................................................................................................................33 DEFINITIONS..............................................................................................................................34 ABBREVIATIONS....................................................................................................................... 39 Yazoo River Basin 2 Organic Enrichment/Low Dissolved Oxygen TMDL for Deer Creek PHOTOS Photo 1. Deer Creek ....................................................................................................................... 5 FIGURES Figure 1. Deer Creek Watershed.................................................................................................... 7 Figure 2. Deer Creek Watershed 303(d) Listed Segment and Drainage Area ............................... 8 Figure 3. DO Data Compared to Temperature Data .................................................................... 16 Figure 4. DO Data Compared to Sample Month.......................................................................... 16 Figure 5. Landuse Distribution Map for Deer Creek Watershed ................................................. 19 Figure 6. Instream Processes in a Typical DO Model.................................................................. 21 Figure 7. Deer Creek Model Setup (Note: Figure not to Scale).................................................. 22 Figure 8. Baseline Model Output for Deer Creek ........................................................................ 27 Figure 9. Model Output for Deer Creek after Application of Maximum Load Scenario ............ 28 TABLES i. Listing Information ..................................................................................................................... 4 ii. Water Quality Standard.............................................................................................................. 4 iii. NPDES Facilities ...................................................................................................................... 4 iv. Total Maximum Daily Load for TBODu.................................................................................. 4 Table 1. Water Quality Data for Deer Creek, MDEQ Station 07288770 .................................... 11 Table 2. Water Quality Data for Deer Creek, Station 07288770, Continued .............................. 11 Table 3. Water Quality Data for Deer Creek, Station 07288770, Continued .............................. 12 Table 4. Water Quality Data for Deer Creek, Station 07288770, Continued .............................. 12 Table 5. Summary of NRCS Data Collected in Leland, SE Deer Creek Drive ........................... 13 Table 6. Summary of NRCS Data Collected in Leland, SE Deer Creek Drive, Continued......... 13 Table 7. Summary of NRCS Data Collected in Hollandale, Murphy Road................................. 13 Table 8. Summary of NRCS Data Collected in Hollandale, Murphy Road, Continued.............. 13 Table 9. Water Quality Data Collected for Deer Creek Restoration Project ............................... 14 Table 10. Water Quality Data Collected for Deer Creek Restoration Project ............................. 15 Table 11. Identified NPDES Permitted Facilities ........................................................................ 17 Table 12. Landuse Distribution.................................................................................................... 18 Table 13. Point Source Loads as Input into the Model ...............................................................